Bucket-wheel.



(L M. SGHULTZ.

BUGKBT WHEEL.

APPLIUATIGN FILED 12113.10, 190s.

@2f-ML f Patented June 15, 1909.

narrare sacarse ras-Enr onirica.

CLARENCE l\'l. ,SOl-1ULTZ, OF LYNN, MASSACHUSETTS, SSIGNOR TO GENERALELECTRIC COMPANY, A CORPORATION OF NEW YORK.

BUCKET-WEL.

Specification of Letters Patent.

Patented .rune 15, l1909.

Application ied February 1G, 1908. Serial No. L115,080.'

improvements in Buckethecls, of which` the .following is aspecification.

T he present invention relates to bucket wheeis and has for its .objectto improve their construction.

.ln the accompanying drawing which illustrates one of the embodiments ofmy invention, Figure 1 is a partial view in side eleva- 'tion oi abucket wheel; and Fig. 2 is a partial axial section ofthe same.

in carrying out my invention, the web 1 of the wheel is made out ol afiat steel plate of uniform thickness. These plates are comparativelyinexpensive and can be rolled in a rolling mill to the exact, orapproxinuttelyv exact, thickness, so that the sides thereof do not haveto be dressed or finished, except to receive the bucket supports andhub. These plates may be .roughly sheared to approximately the properdiameter after which they are put in a boring mill or lathe and theperipheral surface turned true.

My improved wheel is provided with two rows of buckets 2 and 3, and itis evident that il a plate of uniform thickness is to be employed toform the web that special means must be provided to form the bucketsecuringmeans which arc separate therefrom. ,if the disk Vbe providedwith an in tegral flange at the rim to form a part of the bucketsecuring means, it lollows that the entire side surfaces of the webwould have to be machined. I avoid this by providing a sup ort ol novelconstruction for each vrow .of sockets. Each suiiport comprises twomembers 4c and 5, an outer and an inner.

` The inner member 4 is provided with an annular projection which entersanannular groove in the plate situated below the sur face thereof', andthe outer member 5 is provided with an annular projection 7 that alsoenters an annular groove formed in the saine side of the plate and belowthe surface thereof, the two grooves being' concentric. The projectionsor shoulders on the said members receive the strains duc to centrifugalforce and are anchored by the walls of the grooves. The outer member 5is shouldered or 'cut away atS to receive the inner member .4, and theparts are secured in place by the axiallyextending rivets or bolts 9,

members 5 on the bucket support.

The buckets are providedwith bases 10 of suitable s ape, for example, ininverted T 'or equivalent shape. These bases are seated in grooves 11formed partly in the member 4 and partly 4in the member 5 of thesupport. The buckets may be spacedapart by spacing blocks in theusualzmannenb The endslof will be noted that each rivet or bolt holdsthe two inner members 4 and also the outer the buckets are provided'with` integral-, tenons 12 which project through corresponds inglyshaped holes in the cover or shroud 13 and are afterward riveted over tosecure the same in place. The bucket covers are made. in sections, asindicated in Fig. 1, as are also thebucket su ports, since thisfacilitates assembling. nder certain conditions, however, the supportscan be made annular, the- -structure otherwise being the same.

The wheel is mounted on"-a shaft 1.21 by means of the hub 15, the latterbeing secured by a key 16 to the shaft. The hub is secured to the web byaxially-'extending bolts or riv-` ets 17. lf desired, the hub "may beprovided with a shoulder 18 indicated in dotted lines,

which enters a groove .in the webv and 1s formed below the side surfacethereof; the

vobject of this annular shoulder or projection being to relieve the bolt17 of strains due to centrifugal force.

From the foregoing it Will be seen that I' vwhich do not have to befinished except, at or about the portions which support, the buckets andreceive the hub and sh'al't."V Itis f'urther to be noted that all of theshoulders on the web which receive centrifugalstrains are located belowlthe side faces thereof, nd hence no extra metal is required for thepurpose. I

In accordance with the provisions ofthe 'patent statutes, I havedescribed the prin#

